Focal plane illumination
2" focuser vignetting for imaging newtonian? - Reflectors - Cloudy Nights
Secondary Mirror Replacement, Offset, Collimation, Testing - Deep Sky Watch
Lockwood Custom Optics - Why aren't my stars round?
Optical aberrations: how to fix errors in your telescope | BBC Sky at Night Magazine
A Treatise on Newtonian Collimation (Text)
Optical aberrations: how to fix errors in your telescope | BBC Sky at Night Magazine
Two-mirror telescopes: Cassegrain, Gregorian and variants
TS-Optics 8" f/5 UNC Newtonian Telescope | Astronomy Technology Today
Collimating a Newtonian telescope
Vignette on ASI 6200 Pro Mono - ZWO User Forum
Worldwide coma correction exercise – AstroFotoBlog
Focal plane illumination
Newtonian Telescope | ronen-sarig-designs
Telescope Optics Topics
3.2.2.2 Off-axis effective area
Stellafane Checking & Correcting Your Design
Secondary Mirror Replacement, Offset, Collimation, Testing - Deep Sky Watch
Which telescope for astrophotography?
Vignetting Compensation
Two-mirror telescopes: Cassegrain, Gregorian and variants
The Maksutov-Newtonian Telescope: discussion, survey and an image of the 10 day old Moon – Professor Morison's Astronomy Digest
Confused by maximum FOV calculations, field stop, vignetting - Eyepieces - Cloudy Nights
DobSTUFF - Complete Telescopes or Wood Parts for your Optics
